US3230081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of printing plates utilizing electrostatic image formation techniques
Assignee: Azoplate Corp
•
Filing: 1960-07-19
•
Granted: 1966-01-18
•
Expires: 1980-07-19
Abstract
No abstract record available.
Inventors
- 👤 Tomanek Martha
- 👤 Uhlig Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:09
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G13/00; G03G13/26; G03G13/28; G03G5/0601; G03G5/0618; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0635; G03G5/07; G03G5/071; G03G5/072; G03G5/073; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR PREPARING A PRINTING PLATE WHICH COMPRISES EXPOSING A CHARGED, SUPPORTED, PHOTOCONDUCTIVE INSULATING LAYER COMPRISING A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ALKALI-SOLUBLE ORGANIC PHOTOCONDUCTOR AND AN ALKALI-INSOLUBLE ORGANIC PHOTOCONDUCTOR IN ADMIXTURE WITH AT LEAST ONE ALKALI-SOLUBLE COMPOUND SELECTED FROM THE GROUP CONSISTING OF AROMATIC CARBOCYCLIC AND AROMATIC HETEROCYCLIC COMPOUNDS, TO LIGHT UNDER A MASTER, DEVELOPING AND FIXING THE RESULTING IMAGE, AND TREATING THE EXPOSED LAYER WITH AN ALKALINE LIQUID HAVING A HYDROXYL ION CONCENTRATION SUBSTANTIALLY GREATER THAN 10**-7 MOLES PER LITER.
Claim 2
Dependent Claim
86 words
A PROCESS FOR PREPARING A PRINTING PLATE WHICH COMPRISES EXPOSING A CHARGED, SUPPORTED, PHOTOCONDUCTIVE INSULATING LAYER COMPRISING A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ALKALI-SOLUBLE ORGANIC PHOTOCONDUCTOR AND AN ALKALI-INSOLUBLE ORGANIC PHOTOCONDUCTOR IN ADMIXTURE WITH AT LEAST ONE ALKALI-SOLUBLE COMPOUND SELECTED FROM THE GROUP CONSISTING OF AROMATIC CARBOCYCLIC AND AROMATIC HETEROCYCLIC COMPOUNDS, TO LIGHT UNDER A MASTER, DEVELOPING AND FIXING THE RESULTING IMAGE, AND TREATING THE EXPOSED LAYER WITH AN ALKALINE LIQUID HAVING A HYDROXYL ION CONCENTRATION SUBSTANTIALLY GREATER THAN 10**-7 MOLES PER LITER.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |